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UK Water Softeners, 27 Old Gloucester Street, London WC1N 3AX, Tel:0845 0563468, Email:

Water Hardness Test Kit

Water Hardness Test Kit
Accurate to 10ppm hardness, setting the correct hardness setting on your water softener will ensure that it will operate at peak efficiency.

Total Price with VAT and FREE Delivery: £19.99 Fill the vial to 20ml of water to be tested.
Add 4 drops of KW-03
Add drops of KW-04, one at a time with mixing. Count how many drops are required for the colour to turn from red to pure blue.

Total hardness (ppm as CaCO3) = drops of KW-04 x 10
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